AY0438

AY0438 32-Segment CMOS LCD Driver FEATURES Drives up to 32 LCD segments of arbitrary configuration CMOS process for: wide supply voltage range, low- power operation, high-noise immunity, wide temperature range CMOS and TTL-compatible inputs Electrostatic discharge protection on all pins Cascadable On-chip oscillator Requires only three control lines PIN CONFIGURATION 40-Lead Dual In-line VDD LOAD SEG 32 SEG 31 SEG 30 SEG 29 SEG 28 SEG 27 SEG 26 SEG 25 SEG 24 SEG 23 SEG 22 SEG 21 SEG 20 SEG 19 SEG 18 SEG 17 SEG 16 SEG 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 CLOCK SEG 1 SEG 2 SEG 3 VSS DATA OUT DATA IN SEG 4 SEG 5 LCDΦ BP SEG 6 SEG 7 SEG 8 SEG 9 SEG 10 SEG 11 SEG 12 SEG 13 SEG 14 APPLICATIONS Industrial displays Consumer product displays Telecom product displays Automotive dashboard displays DESCRIPTION The AY0438 is a CMOS integrated device that drives a liquid crystal display, usually under microprocessor control. The part acts as a smart peripheral that drives up to 32 LCD segments. It needs only three control lines due to its serial input construction. It latches the data to be displayed and relieves the microprocessor from the task of generating the required waveforms. The AY0438 can drive any standard or custom parallel drive LCD display, whether it be field effect or dynamic scattering; 7-, 9-, 14- or 16-segment characters; decimals; leading + or -; or special symbols. Severa...